Softwr
HAProxy logo

HAProxy

High-performance TCP and HTTP load balancer

Overview

What HAProxy does

HAProxy is an open-source load balancer and proxy for TCP and HTTP applications, with a long reputation for handling very high connection volumes on modest hardware. It is used in front of some of the largest sites on the internet. Its strengths are performance and control: detailed health checking, connection queueing, rate limiting and traffic rules expressed with real precision. Its cost is a configuration language that assumes you know what you are doing, and a stats interface that is functional rather than pleasant.

What people use it for

  • Load balancing at traffic levels where proxy efficiency shows up in the hardware bill
  • Precise traffic control — rate limits, sticky sessions, complex routing rules
  • TCP load balancing for databases and non-HTTP services

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about HAProxy.

  • Configuration syntax is dense and unforgiving, with a steep initial learning curve
  • No automatic certificate management, unlike newer servers that treat it as default behaviour
  • The built-in stats page is basic, so real observability needs exporters and dashboards
  • A dedicated load balancer is more machinery than small deployments need

Cross-shopped

What people choose instead of HAProxy

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

  • HAProxy logo
    HAProxy
    vs
    Nginx logo
    Nginx

    Nginx: More approachable and doubles as a web server, with less specialised balancing

  • HAProxy logo
    HAProxy
    vs
    Caddy logo
    Caddy

    Caddy: Automatic HTTPS and far simpler configuration, at lower peak throughput

Pricing

What HAProxy costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

HAProxy

Free

  • Full functionality
  • No usage limits
  • Community support

Capabilities

Features

  • High throughput

    Handles very large connection counts with low CPU and memory

  • Layer 4 and 7

    Balances raw TCP and HTTP with content-aware routing

  • Health checking

    Detailed active and passive checks with configurable thresholds

  • Rate limiting and ACLs

    Fine-grained traffic control expressed in configuration

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

Is HAProxy free?

Yes, the community version is open source. HAProxy Technologies sells HAProxy Enterprise separately.

HAProxy or Nginx?

HAProxy is a specialist load balancer with deeper balancing and health-check features. Nginx also serves static content and is more approachable, which is why it is more common as a general web server.

Does HAProxy handle TLS certificates automatically?

No. Certificate issuance and renewal are external, unlike Caddy where it is automatic.

Share

Keep looking

Where to go from HAProxy

Best Cloud software for

Compare HAProxy with

Other Cloud software

  • Serverless Postgres for modern developers

  • Modern infrastructure as code using programming languages

  • Deploy web applications globally

  • Platform for scaling AI and data workloads on Ray, built by Ray's creators

  • Fast inference and fine-tuning platform for open and custom AI models

  • Daemonless container engine with a Docker-compatible CLI

  • A modern cloud platform for the next generation

  • Manage Secrets and Protect Sensitive Data

  • Cloud and AI security platform unifying code, cloud, and runtime protection.

  • Serverless GPU computing with sub-second cold starts and multi-cloud support

  • Serverless GPU infrastructure for real-time AI inference and applications

  • Low-cost cloud API for running open-source AI models

  • Build fast, reliable, and efficient software at scale

Softwr does not host reviews and shows no star rating for HAProxy, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

More on HAProxy

Best Cloud software alternatives

Distributed tracing system for microservice latency

Highly available Prometheus with long-term object storage

GitOps continuous delivery for Kubernetes

Template-free customisation of Kubernetes YAML

Kubernetes management platform for multiple clusters

Web server with automatic HTTPS by default

Compare HAProxy with alternatives